Beamforming Transmission in IEEE 802.11ac under Time-Varying Channels

Title
Beamforming Transmission in IEEE 802.11ac under Time-Varying Channels
Author(s)
유희정김태준[김태준]
Keywords
PERTURBATION; CAPACITY
Issue Date
201407
Publisher
HINDAWI PUBLISHING CORPORATION
Citation
SCIENTIFIC WORLD JOURNAL
Abstract
The IEEE 802.11ac wireless local area network (WLAN) standard has adopted beamforming (BF) schemes to improve spectral efficiency and throughput with multiple antennas. To design the transmit beam, a channel sounding process to feedback channel state information (CSI) is required. Due to sounding overhead, throughput increases with the amount of transmit data under static channels. Under practical channel conditions with mobility, however, the mismatch between the transmit beam and the channel at transmission time causes performance loss when transmission duration after channel sounding is too long. When the fading rate, payload size, and operating signal-to-noise ratio are given, the optimal transmission duration (i.e., packet length) can be determined to maximize throughput. The relationship between packet length and throughput is also investigated for single-user and multiuser BF modes.
URI
http://hdl.handle.net/YU.REPOSITORY/31489http://dx.doi.org/10.1155/2014/920937
ISSN
1537-744X
Appears in Collections:
공과대학 > 모바일정보통신공학과 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE